diff --git a/README.md b/README.md
index 69103ecb..afaee1c5 100644
--- a/README.md
+++ b/README.md
@@ -3,10 +3,9 @@
 # ember-test-selectors
 
 This Ember CLI Addon __removes all HTML 5 data attributes starting with
-`data-test-` in all environments other than `development` and `test`__. That
-allows using data attributes as selectors for integration and acceptance tests
-without polluting the generated markup of the production (or staging etc.)
-application.
+`data-test-` in the `production` environment__. That allows using data
+attributes as selectors for integration and acceptance tests without polluting
+the generated markup of the production (or staging etc.) application.
 
 ## Installation
 
@@ -83,16 +82,15 @@ Also it allows to encode more data in the markup like e.g. the post's id:
 </article>
 ```
 
-`ember-test-selectors` makes sure to remove all these `data` attributes in all
-environments except `development` and `test` so that __users will have
-perfectly clean HTML delivered__:
+`ember-test-selectors` makes sure to remove all these `data` attributes in the
+`production` environment so that __users will have perfectly clean HTML
+delivered__:
 
 ```html
 <article>
   <h1>My great post</h1>
   <p>Bla bla…</p>
 </article>
-```
 
 ## License
 
diff --git a/index.js b/index.js
index 03b2460d..6367ce5b 100644
--- a/index.js
+++ b/index.js
@@ -5,7 +5,7 @@ module.exports = {
   name: 'test-selectors',
 
   included: function() {
-    if (this.app.env !== 'development' && this.app.env !== 'test') {
+    if (this.app.env === 'production') {
       this.app.registry.add('htmlbars-ast-plugin', {
         name: 'strip-test-selectors',
         plugin: StringTestSelectorsTransform